Safety device for elevators.



No. 883,279. PATENTED MAR. 31, 1908.

" J. J. BENNETT & J. KLEIN.

SAFETY DEVICE FOR ELEVATORS.

APILIOLTIOH FILED APR. 15,1907.

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No. 883,279. PA TENTED MAR. 31, 1908.

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SAFBTYDEVIGE FOR ELEVATORS.

' APPLICATION FILED APR. 15,1907.

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JOHN J. BENNETT AND JOSEPH KLEIN, OF GENTRALIA, ILLINOIS.

SAFETY DEVICE FOR ELEVATORS.

Specification of Letters Patent.

Patented March 31, 1908.

Application filed April 15, 1907. Serial No. 868,337.

To all whom it may concern:

Be it known that we, JOHN J. BENNETT and JosErn KLEIN, citizens of theUnited States, residing at Centralia, in the county of Marion and Stateof Illinois, have invented certain new and useful Improvements in SafetyDevices for Elevators; and we do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

Our invention has a relation to new and useful improvements in safetydevices for elevators, and is primarily designed to be used inconnection with mining elevators or cages.

The object of our invention is to provide an elevator with simple,economical and efficiently operating means for insuring against anyliability of the car falling when in opera-. tion.

With these and other objects in view, as will readily appear as thenature of the invention is better understood, our invention consists inthe construction, combination and arrangement of devices illustrated inthe drawings and particularly pointed out in the specification andclaims hereunto appended.

Figure 1 is a side elevation of a car provided withmy improved meanssecured in operative position to an elevator guide frame partiallybroken away Fig. 2 is a central vertical sectional view; and Fig. 3 is acentral cross sectional view.

Referring now more particularly to the drawings, it will be seen thatthe elevator is provided with the usual vertical guide bars 2.

3 indicates the side supporting frames, which comprise each twovertically-disposed bars 4 secured at their lower ends to the sides orbottom of the car or cage 5 and connected at their upper ends by crossbars 6.

The numeral 7 indicates two vertical cen tral guide bars, which areconnected at their ends in the bifurcated ends of an angle bar 8 and areprovided on their inner faces, near their upper and lower ends withoppositelydisposed vertical guide plates 9, adapted to work againstopposite edges of the vertical guide bars 2.

10 indicates the horizontal supporting bar, which is secured at its endsto the inner faces and inner upper ends of said vertical guide bars 7and has securely bolted or otherwise secured to its upper face astationary plate 11, having recesses 12 in its side edges and providedat its side edges with hinged plates 13 having recesses 14 in theirinner side edges, corresponding with and opposite the recesses 1n theside edges of said stationary plate 11.

15 indicates two corresponding horizontal operating rods, which are journaled in parallelism at their ends in cross bearing plates 16,secured at their ends to the inner faces and inner upper ends of saidvertically-disposed bars 4, each of said rods being provided at itscenter with an outwardly-extending operating arm 17. Each of saidhorizontal operating rods 15 is provided outwardly of saidoutwardly-extending operating arm 17 with two outwardly-extendingholding arms 18, and at its extreme ends with outward-extendingoperating arms 19.

The numeral 20 indicates a rod or bolt having a thread at its lower endand provided at its upper end with suitable means for attaching one endof a cable 21 or other equivalent means thereto. The upper end of saidthreaded rod or bolt 20 works through a corresponding perforation oropening 22 in said angle bar 8 and at its lower end through acorresponding perforation or opening 23 in a horizontal supporting plate24, connected at its eyed ends with the free ends of saidoutwardly-extending operating arms 17 by clevises 25 or other equivalentmeans, and links 26. Said horizontal su porting bar 24 may be connectedwith the rec ends of said outwardly-extending operating arms 17, by anymeans having a suitable amount of flexibility to permit of a slightlateral movement of said car when being raised or lowered.

The numeral 27. indicates two transverse bearing bars, which are securedat their ends to the inner faces of said vertically-disposed bars 4 andsaid central vertical guide bars 7, a suitable distance below saidhorizontal operating rods 15 and are provided on their outer faces withsuitable bearings 28, preferably in the form of angle plates, havingpivoted to their inner faces near their inner ends safety catches 29,which are preferably bifurcated and toothed attheir inner or engagingends and are connected at their outer or opposite ends to the outer endsof said out wardly-ext'ending operating arms 19 by connecting bars 30 orother equivalent means.

31 indicates coiled springs, which are secured at their lower ends tothe sides of said elevator platform 5, and at their upper ends by eyedrods 32 or other means to the lower ends of said connecting bars 30, andserve to maintain a pull on the free ends of said safety catches 29, soas to operate to throw the mner ends of said safety catches inengagement with the vertical guide bars 2 of the said elevator guideframe, should the cable or other means employed for raising the carbecome broken.

33 indicates coiled springs, which are connected at their lower ends bysuitable means to the inner faces of said central vertical guide bars 7,and at their upper ends by suitable means to the outer or free ends ofsaid outwardly-extending operating arms 19, and serve to maintain a pullon the free ends of said operating arms 19 so as to coact with saidsprings 31 in throwing the safety catches in engagement with the guidebars of the elevator guide frame should the cable 21 or other meansemployed for raising the elevator car becomes broken.

In the operation of my invention, the pull exerted on the cable 21 bythe mechanism employed to raise or lower the car serves through themedium of the mechanism described to raise the outer ends of saidoutwardly-extending operating arms 17 and effect a partial rotation ofsaid horizontal operating rods 15, which in turn, through the medium ofsaid outwardlyextending operating arms 19 and connecting bars 30, raisethe outer or free ends of said safety catches 29 and throw the inner orengaging ends of the same out of engagement with the s ides of thevertical side bars of said elevator guide frame. Said holding arms 18afford a means for the passengers riding on the platform to hold to.Should the cable 21 or other means employed to raise or lower said carbecome broken, and the pull exerted on the outer ends of saidoutwardly-extending arms 17 be thereby removed, said coiled springs 31and 33 throw the inner or engaging ends of the safety devices intoengagement with the vertical bars 2 of the elevator guide frame, andprevent a further descent of said car.

While the two separate springs 31 and 33 respectively, normally coact tothrow the safety catches in engagement with the guide bars 2 of theelevator guide frame and thereby check the descent of the car 5 shouldthe cable 21 or other means employed to raise said car become broken,should either set of springs become inoperative for any reason the otherset will independently throw the safety catches.

From the foregoing, it will be seen that danger of the elevatoraccidentally falling is a practical impossibility.

Having thus described my invention, what I claim as new, and desire tosecure by Letters-Patent, is,

In an elevator, a pair of vertical guides, a car arranged for movementbetween said guides, guide plates carried by the car for travel on theVertical guides, horizontal operating rods ournaled in the car frame andhaving long, outwardly extending operating arms and short operating armsfixed for movement therewith, safety devices pivoted on the car forengagement with the guides to lock the car against downward movement,links connecting the outer free ends of the safety devices with theouter ends of the long operating arms a perforated extension on thelower end of each of said links, coiled springs connecting saidextensions with the floor of the car, coiled springs connecting saidoperating arms with the sides of the car, an angle bar with. aperforation at its middle point connected to the car, a vertical boltslidable in said perforationand su )ported by a cable, and supportingsaid angle bar and car, an eyed supporting plate on the lower end ofsaid bolt, a clevis connecting the eyed ends of said supporting plate, aclevis connecting the free ends of the short operating arms, a linkconnecting the first and second-named clevises, and a removable washeron said bolt between said angle bar and said supporting plate.

In testimony whereof we have hereunto set our hands in presence of twosubscribing witnesses.

JOHN J. BENNETT. JOSEPH KLEIN. I/Vitnesses:

BELLA M JAMES, FRANK F. N OLEMAN.

